This is the 1803rd most frequent Chinese word.
竟
Unexpectedly; actually; to one's surprise.
Here, '竟然' is used to express surprise at an outcome that is unexpected.
他竟然忘记了今天是我的生日。
He actually forgot that today is my birthday.
In this sentence, '竟' expresses surprise or disbelief regarding an unexpected conclusion.
事情竟会以这样的方式结束。
Things actually ended in such a way.
'竟' is employed to highlight unexpected audacity or boldness in action.